
The facts.
| Brand | BMC |
|---|---|
| Part number | FM903/04 |
| Filter type | Replacement (drop-in) air filter |
| Filter medium | Four-layer oiled cotton gauze |
| Frame material | Rubber |
| Surround | Aluminium mesh |
| Maintenance | Washable and reusable |
| Fitment | Kawasaki ZX-10 R / ZX-10 RR (2016-2026) |
| Testing | Validated to international test standards |
DescriptionThe whole story▼
Born from decades of motorsport heritage, the BMC FM903/04 replacement air filter brings genuine race-derived filtration technology to the Kawasaki ZX-10 R and ZX-10 RR. Its distinctive four-layer cotton gauze construction — steeped in low-tack oil and wrapped in a protective aluminium mesh — is the product of the same engineering discipline that has made BMC a fixture in MotoGP and World Superbike paddocks. For ZX-10 R riders who demand more than the standard paper element can offer, this is the definitive upgrade.
Key Features
- Four-layer oiled cotton gauze delivers higher airflow than the OEM paper filter, reducing pressure drop and freeing up engine performance across the rev range.
- Aluminium mesh surround shields the cotton medium against fuel vapour and oxidation, preserving filter integrity over many thousands of kilometres.
- Rubber frame eliminates the risk of cracking or distortion, ensuring a consistent, leak-free seal within the airbox every time.
- Washable and reusable design means one filter can last the lifetime of the motorcycle — a cost-effective and environmentally responsible alternative to disposable paper elements.
- Enhanced dirt absorption capacity keeps contaminants away from the engine, combining superior filtration efficiency with the airflow gains that define BMC's reputation.
- Developed and validated to international test standards, guaranteeing the quality and consistency expected from a premium Italian filtration brand.
Race Heritage, Road Refinement
BMC — Bmc Bologna Motor Company — built its name supplying air filtration to factory racing teams where marginal gains matter most. The FM903/04 carries that lineage directly into a road-legal form factor, designed as an exact drop-in replacement for the standard ZX-10 R/RR airbox. There is no jetting, no mapping change, and no airbox modification required: the filter simply replaces the OEM element and immediately allows the engine to breathe more freely.
The four-layer cotton construction is the foundation of BMC's performance advantage. Each layer is precision-woven and individually oiled with a low-viscosity, low-tack compound that traps particulates without impeding airflow. Compared with a single-layer paper filter, the result is a measurably higher air volume reaching the throttle bodies at any given engine speed — translating to sharper throttle response and a more linear power delivery that ZX-10 R riders will notice immediately.
Built to Last
The aluminium mesh cage that surrounds the cotton medium is more than a structural element. It actively resists the fuel vapour and moisture that accumulate inside a high-performance airbox, preventing the oxidation that degrades lesser filters over time. Combined with the rubber sealing frame — which absorbs vibration and maintains its shape even under sustained high-rpm use — the FM903/04 is engineered to outlast multiple service intervals without any loss of performance. When performance does taper, the filter is simply cleaned with the appropriate BMC washing kit, re-oiled, and reinstalled.
Fitment & Compatibility
The BMC FM903/04 is a direct OEM replacement air filter for the following Kawasaki models:
- Kawasaki ZX-10 R — 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
- Kawasaki ZX-10 RR — 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025, 2026
No airbox modification is required. The FM903/04 is a like-for-like replacement for the original paper element.
Specifications
- Brand: BMC
- Part number: FM903/04
- Type: Replacement (drop-in) air filter
- Filter medium: Four-layer oiled cotton gauze
- Frame material: Rubber
- Surround: Aluminium mesh
- Maintenance: Washable and reusable
- Fitment: Kawasaki ZX-10 R / ZX-10 RR (2016-2026)
- Testing: Validated to international test standards
FitmentWhich bikes this fits▼
- Kawasaki ZX-10 R/RR (2016–2026)
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Take out the washable lining and hand-wash it in lukewarm water. Clean the shell and visor with a soft cloth and water only — never solvents.
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